package com.bocai.yuweiwangluo.net.sourceforge.simcpux;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import android.util.Xml;

import com.bocai.yuweiwangluo.R;
import com.tencent.mm.sdk.modelpay.PayReq;
import com.tencent.mm.sdk.openapi.IWXAPI;
import com.tencent.mm.sdk.openapi.WXAPIFactory;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.xmlpull.v1.XmlPullParser;

import java.io.StringReader;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;


public class WxPayApi {

    private static final String TAG = "MicroMsg.SDKSample.WxPayApi";

    private Context mContext;
    PayReq req;
    IWXAPI msgApi;
    //	TextView show;
    Map<String,String> resultunifiedorder;
    StringBuffer sb;

    private String mBody = "weixin";
    private String mToltalFee = Integer.MAX_VALUE + "";
    public String prepayId;
    public String outTradNo;


    public WxPayApi(Context context) {
        mContext = context;
        msgApi = WXAPIFactory.createWXAPI(mContext, null);
//		show =(TextView)findViewById(R.id.editText_prepay_id);
        req = new PayReq();
        sb=new StringBuffer();

        msgApi.registerApp(Constants.APP_ID);
        //生成prepay_id(生成预支付订单)
//		GetPrepayIdTask getPrepayId = new GetPrepayIdTask();
//		getPrepayId.execute();

        //生成签名参数
//		genPayReq();

        // 调起微信支付
//		sendPayReq();

        String packageSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
    }

    /**
     生成签名
     */
    private String genPackageSign(List<NameValuePair> params) {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < params.size(); i++) {
            sb.append(params.get(i).getName());
            sb.append('=');
            sb.append(params.get(i).getValue());
            sb.append('&');
        }
        sb.append("key=");
        sb.append(Constants.API_KEY);


        String packageSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
        Log.e("orion", packageSign);
        return packageSign;
    }
    private String genAppSign(List<NameValuePair> params) {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < params.size(); i++) {
            sb.append(params.get(i).getName());
            sb.append('=');
            sb.append(params.get(i).getValue());
            sb.append('&');
        }
        sb.append("key=");
        sb.append(Constants.API_KEY);

        this.sb.append("sign str\n"+sb.toString()+"\n\n");
        String appSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
        Log.e("orion", appSign);
        return appSign;
    }
    private String toXml(List<NameValuePair> params) {
        StringBuilder sb = new StringBuilder();
        sb.append("<xml>");
        for (int i = 0; i < params.size(); i++) {
            sb.append("<"+params.get(i).getName()+">");


            sb.append(params.get(i).getValue());
            sb.append("</"+params.get(i).getName()+">");
        }
        sb.append("</xml>");

        Log.e("orion", sb.toString());
        return sb.toString();
    }

    private class GetPrepayIdTask extends AsyncTask<Void, Void, Map<String,String>> {

        private ProgressDialog dialog;


        @Override
        protected void onPreExecute() {
            dialog = ProgressDialog.show(mContext, mContext.getString(R.string.app_tip),
                    mContext.getString(R.string.getting_prepayid));
        }

        @Override
        protected void onPostExecute(Map<String,String> result) {

            sb.append("prepay_id\n" + result.get("prepay_id") + "\n\n");
//			show.setText(sb.toString());

            resultunifiedorder=result;

            genPayReq();

            if (dialog != null) {
                dialog.dismiss();
            }
            sendPayReq();
        }

        @Override
        protected void onCancelled() {
            super.onCancelled();
        }

        @Override
        protected Map<String,String> doInBackground(Void... params) {

            String url = String.format("https://api.mch.weixin.qq.com/pay/unifiedorder");
            String entity = genProductArgs();

            Log.e("orion", entity);

            byte[] buf = Util.httpPost(url, entity);

            String content = new String(buf);
            Log.e("orion", content);
            Map<String,String> xml=decodeXml(content);

            return xml;
        }
    }

    public Map<String,String> decodeXml(String content) {

        try {
            Map<String, String> xml = new HashMap<String, String>();
            XmlPullParser parser = Xml.newPullParser();
            parser.setInput(new StringReader(content));
            int event = parser.getEventType();
            while (event != XmlPullParser.END_DOCUMENT) {

                String nodeName=parser.getName();
                switch (event) {
                    case XmlPullParser.START_DOCUMENT:

                        break;
                    case XmlPullParser.START_TAG:

                        if("xml".equals(nodeName)==false){
                            //实例化student对象
                            xml.put(nodeName,parser.nextText());
                        }
                        break;
                    case XmlPullParser.END_TAG:
                        break;
                }
                event = parser.next();
            }

            return xml;
        } catch (Exception e) {
            Log.e("orion", e.toString());
        }
        return null;

    }


    private String genNonceStr() {
        Random random = new Random();
        return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
    }

    private long genTimeStamp() {
        return System.currentTimeMillis() / 1000;
    }


    private String genOutTradNo() {
        Random random = new Random();
        return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
    }


    //
    private String genProductArgs() {
        StringBuffer xml = new StringBuffer();

        try {
            String nonceStr = genNonceStr();

            xml.append("</xml>");
            List<NameValuePair> packageParams = new LinkedList<NameValuePair>();
            packageParams.add(new BasicNameValuePair("appid", Constants.APP_ID));
            packageParams.add(new BasicNameValuePair("body", mBody));
//            packageParams.add(new BasicNameValuePair("body", "123"));
            packageParams.add(new BasicNameValuePair("mch_id", Constants.MCH_ID));
            packageParams.add(new BasicNameValuePair("nonce_str", nonceStr));
           // packageParams.add(new BasicNameValuePair("notify_url", ConstantsNet.BASE_URL + "sale/notify_bill_wxin"));
            packageParams.add(new BasicNameValuePair("notify_url", "http://121.40.35.3/test"));
            packageParams.add(new BasicNameValuePair("out_trade_no", outTradNo));
            packageParams.add(new BasicNameValuePair("spbill_create_ip","127.0.0.1"));
            packageParams.add(new BasicNameValuePair("total_fee", mToltalFee));
//			packageParams.add(new BasicNameValuePair("total_fee", "1"));
            packageParams.add(new BasicNameValuePair("trade_type", "APP"));


            String sign = genPackageSign(packageParams);
            packageParams.add(new BasicNameValuePair("sign", sign));


            String xmlstring =toXml(packageParams);

            return new String(xmlstring.getBytes(), "ISO8859-1");

        } catch (Exception e) {

            return null;
        }


    }

    /** 生成签名参数 */
    public void genPayReq() {

        req.appId = Constants.APP_ID;
        req.partnerId = Constants.MCH_ID;
        req.prepayId = resultunifiedorder.get("prepay_id");
        req.packageValue = "Sign=WXPay";
        req.nonceStr = genNonceStr();
        req.timeStamp = String.valueOf(genTimeStamp());
        prepayId = req.prepayId;


        List<NameValuePair> signParams = new LinkedList<NameValuePair>();
        signParams.add(new BasicNameValuePair("appid", req.appId));
        signParams.add(new BasicNameValuePair("noncestr", req.nonceStr));
        signParams.add(new BasicNameValuePair("package", req.packageValue));
        signParams.add(new BasicNameValuePair("partnerid", req.partnerId));
        signParams.add(new BasicNameValuePair("prepayid", req.prepayId));
        signParams.add(new BasicNameValuePair("timestamp", req.timeStamp));

        req.sign = genAppSign(signParams);

        sb.append("sign\n" + req.sign + "\n\n");

//		show.setText(sb.toString());

        Log.e("orion", signParams.toString());

    }

    /** 调起微信支付 */
    public void sendPayReq() {
        msgApi.registerApp(Constants.APP_ID);
        msgApi.sendReq(req);
    }

    /**
     *
     * @param body 商品名称
     * @param toltalFee 支付金额（单位：分）
     */
    public void pay(String body, String toltalFee) {
        mBody = body;
        mToltalFee = toltalFee;
        outTradNo = genOutTradNo();
        GetPrepayIdTask getPrepayId = new GetPrepayIdTask();
        getPrepayId.execute();
    }

    /**
     * 发起
     * @param body 商品名称
     * @param toltalFee 支付金额（单位：分）
     * @param outTradNo 订单号
     */
    public void pay(String body, String toltalFee, String outTradNo) {
        this.mBody = body;
        this.mToltalFee = toltalFee;
        this.outTradNo = outTradNo;
        GetPrepayIdTask getPrepayId = new GetPrepayIdTask();
        getPrepayId.execute();
    }

}